Supernatural Season 10 was almost all about Deanmon and the Mark of Cain, but these issues will take a backseat in this week's all new episode, when Charlie (Felicia Day) returns from Oz.

Episode 10 is titled There's No Place Like Home and the official synopsis reads as follows:

Sam (Jared Padalecki) is scanning the internet for suspicious paranormal activity and comes across a video of Charlie (guest star Felicia Day) beating up a district attorney. Dean (Jensen Ackles) suspects she's back from Oz and hunting on her own, assuming the district attorney must have been a demon. When they do find Charlie, they are shocked when she tells them why she really came back from Oz. Phil Sgriccia directed this episode written by Robbie Thompson

Fans got to see Charlie's whimsical, fun self in her last appearance in the Season 9 episode, Slumber Party. However, going by the promos, it looks like they are going to see a violent version of her after her return from Oz.

The new promo released, also teased a Charlie vs Dean showdown.

The promo starts with Charlie holding the district attorney at knife point, and Dean asking, "What the hell happened to you at Oz?"